Air cooled condenser for refrigerating systems



K. H. HUYETTE 5 L 54 AIR COOLED CONDENSER FOR REFRIGERATING SYSTEMS Sept. 1, 1931.

Filed April 22, 1930 Fig.1.

Inventor Kenneth H. Huyette His Attor'ne Patented Sept. 1, 1931 UNITED STATES PATENT OFFICE KENNETH H. HUYETTE, OF BLUFFTON, INDIANA ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK AIR COOLED CONDENSER FOR REFRIGERATING SYSTEMS Application filed April 22,

My invention relates to air-cooled condensers for refrigerating systems including a plurality of coils of pipe, and has for its object such an arran ement of the coils of pipe that an increased ow of cooling air about them will be obtained. 1 accomplish this by providing an air-cooled condenser including a plurality of coils of pipe which are spaced apart transversely of the direction of flow of air, and decrease in transverse spacing from one end to the other of the condenser.

My invention will be more fully set forth in the. following description referring to the accompanying drawings. and the features of novelty which characterize my invention will be pointed out with particularity in the claims-annexed to and forming a part of this specification.

I]! the drawings Fig. 1 is a side elevation of refrigerating machine partly broken away. having an air-cooled condenser constructed in accordance with my invention; Fig. 2 is a perspective view of the condenser construction shown in Fig. 1; and Fig. 3 is a front elevation of a refrigerator cabinet having a refrigerating machine of the structure shown in Fig. 1 associated therewith.

Referring to the drawings. I have shown my invention in connection with a refrigeratin; machine of the compression type having a compression casing 16 in which a motor and compressor unit is mounted. A plurality of radially arranged cooling fins 11 are attached to the casing. and a condenser 12 is secured to the fins and arranged in spaced relation to the casing. The casing 16 receives the compressed refrigerant directly from the compressor arranged therein. and the compressed gas passes from the case to the condenser through a connection 13. liaising the pressure of the refrigerant in the casing 10 raises its temperature and warms the ca ing. and the arrangement of the condenser 12 about the casing is such as to induce sutlicient upward flow of air between the condenser and the casing and through the coils of the condenser to cool the condenser and casing. lleat from the condenser and the casing is transmitted to the air flowing over them by direct contact therewith and by con- 1930. Serial No. 446,387.

(luetion through the fins 11. This refrigerating machine is associated with a refrigerator CtlblIlOo' 14 having an evaporator 15 therein, and the general construction of the refrigerating machine is like that shown in Patent N 0. 1,736,635, granted November 19, 1929, on the application of Christian Steenstrap, to the assignee of the present invention. The compressed refrigerant is cooled in the condenser 12. so that it is condensed and flows to a float valve 16 which controls the flow of liquid refrigerant from the condenser to the evaporator 15. The desired temperature is maintained in the cabinet 14 by stopping and starting the motor in the compression case 10 in response to variations in the temperature of the evaporator 15, and a control device 17 is connected in the motor circuit and is provided with a thermostatically controlled switch having a thermostatic element in contact with the evaporator 15.

The condenser 12 comprises a plurality of coils of pipe 18. 19 and 20 of different size which are wound about the casing 10 in slots formed in the fins 11 and which are connected together at the ends thereof. These slots form outwardly extending fingers or supports 21 which decrease in Width in successive steps so as to fit the pipe 20 at 22; the pipe 19 at 23, and the pipe 18 at 24, so that the coils of pipe can be simultaneously Wound about the fins and secured in the desired spaced relation. as described and claimed in the copending application by Delbert F. Newman. Serial No. 446,388, filed concurrcntly with this application (D43,195) which is assigned to the assignee of the present invention.

In accordance with my invention, the coils of pipe l8. l9 and 20 are arranged in such manner that an increased flow of air is induced between the condenser and the casing and through the coils of thecondenser, and that during operation of the refrigerating machine the lower part of the casing will be at a higher temperature than the upper part thereof. which reduces condensation of refrigerant in the casing. I accomplish this by making the transverse spacing of the coils 18, 19 and 20 maximum at the bottom of the condenser where the air enters the space, between the coils and the s ace between coils and the casing, and successively decrease this transverse spacing from the bottom to the top of the condenser. In this way I have found that the rate of flow of air obtained is much greater than in the construction in which the coils are spaced uniformly from one end of the condenser to the other and this increased flow is obtained whether the condenser is cooled by natural draft or by a fan. This spacing of the coils of pipe can be conveniently done in the constructlon illustrated by making the slots which form the supports 21 deepest at the bottom of the fins 11 and successively decreasing the depth thereof from the bottom to the top of the fins and also forming the shoulders 23 and 24 on the supports 21. By this arrangement the condenser pipe coils 18, 19, and 20 can be readily wound about the casing 10 and retained in the slotted fins in such relation as to give the desired variation in spacing from the bottom to the top of the condenser.

Although I have descirbed my invention in connection with a particular form of refrigerating machine, I do not desire to be limited thereto, and I intend in the appended claims to cover all modifications which do not depart from the spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. An air-cooled condenser for refrigerating systems including a plurality of coils, said coils being spaced apart transversely of the flow of air and decreasing in transverse spacing from one end to the other.

2. An air-cooled condenser for refrigerating systems including a casing, a plurality of coils surrounding said casing, and spaced therefrom, said coils being spaced apart transversely of the flow of air and decreasing in transverse spacing from one end to the other.

3. An air-cooled condenser for refrigerating systemsincluding a casing, a plurality of fins extending outwardly from said casin said fins having slots therein, and a plura ity of coils of pipe arranged in said slots, said coils of pipe being spaced apart transversely of the flow of air and decresin in transverse spacing from one end to the ot er.

4. A casing, and a condenser including a plurality of coils of pipe surrounding said casing in such relation as to induce an upward flow of air sufiicient to cool said condenser, said coils of ipe being spaced apart transversely of the ow of air and decreasing in transverse spacing from one end to the other.

5. A casing, slotted fins extendin outwardly from said casing, and a plura ity of coils of pipe surrounding said casing and arranged in said slots, said coils of pipe being spaced apart transversely of the flow of air and decreasing in transverse spacing from the bottom to the top of said fins.

In witness whereof I have hereunto setmy hand this 18thday of April, 1930.

KENNETH H. HUYETTE. 

